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Yellow light emitted from a sodium lamp ...

Yellow light emitted from a sodium lamp has wavelength 580 nm. Calculate the frequency nad wave number of yellow light.

Text Solution

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`lamda=580nm=580xx10^(-7)cm" "[because1nm=10^(-7)cm]`
`v=(c)/(lamda)=(3xx10^(10))/(580xx10^(-7))=5.17xx10^(14)s^(-1)`
`overline(v)=(1)/(lamda)=(1)/(580xx10^(-7))=17241.37cm^(-1)`
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